Hello I am trying to use fsockopen() php function to check a valid email address. Here is a code snippet: function checkEmail($email) { if(eregi("^[a-zA-Z0-9_]+@[a-zA-Z0-9\-]+\.[a-zA-Z0-9\-\.]+$]", $email)) { return FALSE; } list($Username, $Domain) = split("@",$email); if(getmxrr($Domain, $MXHost)) { return TRUE; } else { if(fsockopen($Domain,25,$errno,$errstr,30)) { return TRUE; } else { return FALSE; } } } Here is the error from the browser: Warning: fsockopen() [function.fsockopen]: php_network_getaddresses: getaddrinfo failed: Name or service not known in file name line... Here is the failing on the if(fsockopen($Domain,25,$errno,$errstr,30)) line. Does anyone out there have any experience with this error?? I am using a LAMP server. Thank you, Renee Starkey @}-----}----- Information Technologist I 115 Old Horticulture Language Learning Center, Michigan State University Phone: 517-355-7587 Renee Starkey ;-) "Strive to be the best you can be at any given moment in life" RmS